1) external momentum expansion
外动量展开
2) develop extracurricular activities
开展课外活动
3) shell expansion
外板展开
1.
Arithmetic and program realization for shell expansion;
船体外板展开算法及程序实现
2.
The paper presents a program compiled on Auto Lisp language, which can extend the structural member outlines of the body plan to the shell expansion plan, transfer the seam lines on shell expansion plan to the body plane, and calculate the weight and gravity center of the shell plates.
本文介绍用 Auto L isp编程 ,将肋骨型线图上的构件线展开到外板展开图 ,将外板展开图上的板缝线返回到肋骨型线图 ,以及计算外板的重量重
5) Outspread quantity
展开量
6) potential expression
能量展开
补充资料：外外百老汇
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